Composition for encapsulating organic light-emitting device and organic light-emitting display apparatus including the same

Abstract

The present invention relates to a composition for encapsulating an organic light-emitting device and an organic light-emitting display apparatus including the same, and more specifically, to a composition for encapsulating an organic light-emitting device and an organic light-emitting display apparatus including the same, wherein the composition not only secures the performance and lifespan of an organic light-emitting device by effectively blocking, from the outside, moisture or oxygen flowing into an organic light-emitting display apparatus, but also has low permittivity characteristics to improve touch sensitivity of a touch panel.

1 . A composition for encapsulating an organic light-emitting device, the composition comprising: a photocurable monomer comprising all monomers represented by Chemical Formulae 1 to 3; and a photopolymerization initiator: 
       
         
           
           
               
               
           
         
         wherein, in Chemical Formulae 1 to 3, 
         R 1  to R 5  are each independently a (meth)acryloyl group, 
         L 1  and L 2  are each independently a substituted or unsubstituted C 1-10  alkylene group, 
         X 1  and X 2  are each independently hydrogen or a C 1-10  alkyl group, and 
         m and n are each an integer from 1 to 4. 
       
     
     
         2 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the composition for encapsulating the organic light-emitting device has a permittivity of 2.65 or less at a frequency in a range of 100 kHz to 1 MHz. 
     
     
         3 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the composition for encapsulating the organic light-emitting device has a ring parameter of 0.01 to 0.25. 
     
     
         4 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the photocurable monomer further comprises one or more monomers selected from the group consisting of compounds represented by Chemical Formulae 4 to 6: 
       
         
           
           
               
               
           
         
         wherein, in Chemical Formulae 4 to 6, 
         R 6  and R 7  are each independently a (meth)acryloyl group, 
         A is a substituted or unsubstituted C 1-12  cycloalkylene group in which are formed two fused rings that are bridged, 
         B is a substituted or unsubstituted C 6-12  bridged cycloalkyl group, 
         L is a direct bond or a C 1-10  alkylene group, 
         Ar 1  is a C 6-60  aryl group, 
         one of R 8  and R 9  is hydrogen and the other one is a methyl group, and 
         p is an integer from 1 to 300. 
       
     
     
         5 . The composition for encapsulating the organic light-emitting device of  claim 4 , wherein an amount of the photocurable monomer is 20 wt % to 99 wt %, based on a total weight of the composition. 
     
     
         6 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the monomer represented by Chemical Formula 1 is one or more selected from the group consisting of 1,14-tetradecanediol di(meth)acrylate, 1,15-pentadecanediol di(meth)acrylate, 1,16-hexadecanediol di(meth)acrylate, 1,17-heptadecanediol di(meth)acrylate, and 1,18-octadecanediol di(meth)acrylate. 
     
     
         7 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the monomer represented by Chemical Formula 2 is one or more selected from the group consisting of isotetradecyl (meth)acrylate, isopentadecyl (meth)acrylate, isohexadecyl (meth)acrylate, isoheptadecyl (meth)acrylate, and isooctadecyl (meth)acrylate. 
     
     
         8 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the monomer represented by Chemical Formula 3 is one or more selected from the group consisting of bisphenol-A ethylene oxide diacrylate, bisphenol-A ethylene oxide dimethacrylate, bisphenol-A ethoxylate diacrylate, bisphenol-A polyethoxylate diacrylate, and bisphenol-A diacrylate. 
     
     
         9 . The composition for encapsulating the organic light-emitting device of  claim 4 , wherein a photocurable monomer represented by Chemical Formula 4 is a compound represented by Chemical Formula 7: 
       
         
           
           
               
               
           
         
       
     
     
         10 . The composition for encapsulating the organic light-emitting device of  claim 4 , wherein a photocurable monomer represented by Chemical Formula 5 is a monomer selected from the group consisting of Chemical Formulae A-1 to A-3: 
       
         
           
           
               
               
           
         
       
     
     
         11 . The composition for encapsulating the organic light-emitting device of  claim 4 , wherein a photocurable monomer represented by Chemical Formula 6 is ethylene propylene diene monomer (EPDM). 
     
     
         12 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein the photopolymerization initiator is one or more selected from the group consisting of triazine-based, acetophenone-based, benzophenone-based, thioxanthone-based, benzoin-based, phosphorus-based, oxime-based, and a mixture thereof. 
     
     
         13 . The composition for encapsulating the organic light-emitting device of  claim 1 , wherein an amount of the photopolymerization initiator is 0.1 wt % to 10 wt %, based on a total weight of the composition. 
     
     
         14 . The composition for encapsulating the organic light-emitting device of  claim 1 , further comprising one or more additives selected from the group consisting of a surfactant, a curing accelerator, and an antioxidant. 
     
     
         15 . An organic light-emitting display apparatus comprising an encapsulation portion containing the composition for encapsulating the organic light-emitting device of  claim 1 .